水平均值濾波器的matlab代碼

Question

如何將水平均值濾波器應用於matlab中的譜圖？

Answer 1

有很多方法。例如，您可以使用conv。

對於一維譜圖：

%# create some sample data 
spectrogram = randn(1,1000); %# row vector of length 1000 with random values 

%# define filter window 
windowSize = 5; %# size of filter window 

%# filter 
filteredSpectrogram = conv(spectrogram,ones(1,windowSize)/windowSize,'same'); 

對於二維譜圖（和水平僅爲filter）

%# create some sample data 
spectrogram = randn(100,1000); %# 100 rows, 1000 cols of random values 

%# define filter window 
windowSize = 5; %# size of filter window 

%# filter 
filteredSpectrogram = conv2(spectrogram,ones(1,windowSize)/windowSize,'same');